[Ocfs2-devel] [PATCH 3/4] ocfs2: fix slow deleting

[Joel Becker]

On Fri, Jul 29, 2011 at 06:06:14PM +0800, Wengang Wang wrote:
> There is a case that the application deletes a large number(XX kilo) of files in
> short time (5 minutes). The deletions of some specific files are extreamly slow
> (costing xx~xxx seconds). That is unacceptable.
> 
> Reading out the dir entries and the relavent inodes cost time. And we are doing
> that with i_mutex held, it causes unlink path waiting on the mutex for long time.
> 
> fix:
> make the orphanscan work with lower priority. That means when unlink/delete_inode,
> come, orphanscan should break the walking in orphandir and release the lock(mutex and
> cluster lock). 

	I see what you're getting at here, but I'm not sure I like the
flag method.  Gotta think about it.

Joel

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